DESIGN AND FABRICATION OF STIRLING ENGINE

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Presentation transcript:

DESIGN AND FABRICATION OF STIRLING ENGINE GUIDE : Mr.VICKNESH KUMAR TEAM COMPOSITION A.A ARULSELAVAN ARAVIND.B DINESH.R

ABSTRACT The main objective of this project is to create a working model of the stirling engine with certain modifications. These modifications help in improving efficiency and also the power output of the engine. Modification Explanation

STIRLING ENGINE Every Stirling engine has a sealed cylinder with one part hot and the other cold. The working gas inside the engine (which is often air, helium, or hydrogen) is moved by a mechanism from the hot side to the cold side. When the gas is on the hot side it expands and pushes up on a piston. When it moves back to the cold side it contracts. Properly designed Stirling engines have two power pulses per revolution, which can make them very smooth running. Two of the more common types are two piston Stirling engines and displacer-type Stirling engines. The two piston type Stirling engine has two power pistons. The displacer type Stirling engine has one power piston and a displacer piston.

WORKING The angular momentum of flywheel 1 and the partial vacuum created by cooling the gas in the cold cylinder draws the cold piston 3 to the top of the cold cylinder. This pushes the gas into the hot cylinder 2 where the gas is heated and expands. The expanding gas pushes equally on both pistons, but the angular momentum of the flywheel is such that it will continue to exert a force on the cold piston. The expanding gas will then drive the hot piston down, beginning the power stroke 1 2 2 3 HEAT ADDITION

WORKING The gas continues to expand, and the hot cylinder 2 has completed its power stroke. The hot gas expands into the cold cylinder 3, exerting a force on the cold piston. The cold cylinder increases in volume and draws more of the hot gas into it where it begins to cool. The angular momentum of the flywheel 1 pushes the hot piston back into the cylinder and thus pushes more gas into the cold cylinder 1 2 3 3 EXPANSION

WORKING The gas is at its maximum volume. This stroke is powered by the angular momentum stored in the flywheel 1 from the power stroke. The hot cylinder 2 continues to push the gas into the cold cylinder 3. The gas continues to cool and the pressure goes down. This partial vacuum created by the cooling gas sucks both pistons towards the tops of the cylinders. 1 2 3 4 HEAT REMOVAL

WORKING 1 The gas is cooled and the angular momentum stored in the flywheel 1 drives the cold piston 3 into the cylinder. This compresses the gas and begins to push the gas into the hot cylinder 2 where the piston at top dead center. The hot piston, driven by the momentum of the flywheel, begins to move out, expanding the volume of the cylinder. 2 1 3 HEAT REMOVAL

An example of Stirling engine

Design intent

COST ESTIMATION Material cost:1000 INR Machining cost:1500 INR Auxiliary cost:1000 INR Total Cost:4000 INR

CONCLUSION Thus this projects is aimed at developing an engine which is efficient and effective in the near future and also the cost of manufacturing is less.

THANK YOU!.......